Power supply



FIG. 1 is an enlarged front elevational view of the power supply according to our new design.

FIG. 2 is a rear elevational view thereof.

FIG. 3 is a left side elevational view thereof.

FIG. 4 is a right side elevational view thereof.

FIG. 5 is a top plan view thereof.

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a perspective view thereof, looking toward the front right corner. 

The ornamental design for a power supply, as shown and described. 